Gasket-spinning machine



Nov. 4 1924- M. MATHESON GASKET SPINNING MACHINE Filed May 11. 1923 I5 Sheets-Sheet 1 Nov. 4 1924. 1,514,328

M. MATHESON GASKET SPINNING MACHINE Filed May 11. 1923 5 Sheets-Sheet 2 Nov. 4, 1924. 1,514,328

M. MATHES O N GASKET SPINNING MACHI ENE Filed May '11. 1923 3 Sheets-Sheet 5 Patented Nov. 4, 1924.

UNWEQ W onnoon MATHESON, oncnroaeo, ILLINOIS, ASSIGNORTQ nowtnnn n. Anarony, on. cnrcaeo, rumors.

GASKET-SPINNING MACHINE.

Application filed May 11,

To all whom it may concern:

Be it known that I, Moaooon MATHESON, a citizen of the United States, and a resident of the city of Chicago, in the county of ,Cook and State of Illinois, have invented certain new and useful Improvements in a Gasket-Spinning Machine; andI do hereby declare that the following is a full, clear, and exact description of the same, reference 10, being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention comprises a machine for spinning metal gaskets from sheet stock; in other words, for forming endless circular packing rings from ductile metal. Such rings are extensively usedeither with or without other packing on revolving or re- Q ciprocating shafting passing through some form of'bulkhead, such, for example, as cylinder heads.

It is an object of this invention to pro vide a simple machine for attachment to ordinary lathes adapted to spin U or L shaped circular gaskets or packing glands from duc tile metal. 7

It is another object of this invention to provide a machine of the class described .adaptedto form any desired size of gaskets withoutrequiring alteration of the machine itself in any way in changing from one size to another.

It is a further object of this invention to provide a device of the class described-havinga plurality of independent forming or spinning rollers, one of which forms part of theanvilfor another of the rollers during one. operation to produce a flange on the ma 0 terialfree from buckles or waves.

Itis still another object of this invention to provide a device of the class described having in conjunction with formingrollers a spring pressed finger orguide adapted to hold the material incontact with the forming roller during the binding operation.

It is another objectof this invention to provide a device of the class described having; adjustable trimming and cutting off tools whereby a complete self centeredmachine .is produced.

It is an important object of this invention to provide a mechanism of the class described adapted to rapidly and economically produce gaske from h t metal o k- 1923. Serial no. 538,198.

Other and further important, objects of this'invention will be apparent from the disclosures inthe specification andacc0mpanymore fully described.

On the drawings:

Fig. l is a top plan'view of a gasket spin ning machine embodying features'of thisinvention in position engagingwith a 'metal plate mounted between face'plates on the spindles of a speed lathe, details of 'thelathebeing omitted for clearness.

Fig. 2 is an end view looking at theside of the device which faces the head stock of the lathe.

Fig. 3 is an elevation of'the operating side of the device, i. e., from a position across the lathe bed from the operator.

Fig. 4 is an enlarged detail of the spinning tools as shown in Fig. 1 inposition for the first operation and showing the operation and results of the first turn over and trimming stages. k

Fig. 5 is a detail of the .position of the tools after the second spinning rolle'r has been withdrawn into a position toforin the:

second turnover, and shows in dotted lines the operations and results in thesecond; turn over and cutting off stages. I

r Fig. 6 is an enlarged detail the cutting off tool.

Fig. 7 is a section on the line 77 of; Fig. 1.

As shown on the drawings; The devioeof this inventionis inten'dedto spinIU-shaped gaskets out of circular fiat metal plates such as indicatedby the numeral 10in Fig.1. The plate is intendedto be mounted between face plates 11-and 12 on spindles car sect-ion of .ried in the head and tailfstocks respectively of a lathe. A pin 13 is used to center-the plate 10 in the face plates. The particular embodiment illustratedrefers to theusual speed latheconstruction wherein the usual tool rest is adjustable in a vertically bored boss on the cross slide ofthe lathe carriage. I All the well-known details oflsuch a lathe have been omitted from the drawings for the sake of avoiding unnecessary details of elements comprising no part of: the present invention. is to be understood' that the device of this invention is intended to be equally applicable to lathes other than those commonly designated as speed lathes, as when spinning the larger slzes of gaskets a large engine lathe may be required to swing the necessary diameter of material.

The device of this invention comprises a turnover, including a member 15, which may be solid, but preferably, and in the form illustrated, it is in the form of a roller, adapted to bend or spin the material of the plate 10 at right angles over a shoe or anvil 16, the roller 15 being mounted on the lower end of a handle 17 pivoted about a bolt 18 secured in an upstanding boss 19 attached to a carriage or base 20 which is slidable in a support 21 adapted to be mounted on the regular lathe carriage cross slide. The base 20 is held in place on the support with an adjustable amount of sliding friction by the gibs or keys 22 and set screws 23, and is operated by the lever 24 and link 25, the

lever 24 being pivoted on an extension 26 of the support 21.

A spring-pressed pivoted finger 27 contacts the material of the plate opposite the cutter outof the way.

roller 15, and yields as the roller advances to prevent buckling of the plate as it is being turned over. The roller handle 17 is given a certain amount of resistance by a friction washer 28 under the bolt head to prevent chattering of the roller and consequent uneven surfaces on the resulting gasket.

A trimming cutter 29 is mounted, in a pivoted member 47, on the base 20, and a springv 30 provided to normally hold the An upstanding post 31 is provided on the cutter to be engaged by a set screw 32 in a link 33, the free end of which carries a lost motion link 34 engaged by a stud 35 on the handle 17, to force the cutter 29 to trim the more or less ragged edge of the plate 10 after the first bend has been completed.

The back of a second roller 36 forms a continuation of the shoe 16 during the first spinning operation. It is to be understood that the member 36 may be solid if desired, but preferably I make it in the form of a roller which is mounted on a bar 37, on which the finger 27 is pivoted. This bar is disposed at an angle across the carriage parallel to the line of the right hand side of the shoe 16 and spaced therefrom sufficiently to allow for the thickness of the material 10 between the roller 36 and the shoe 16. This liar has a bearing against the stationary bar 37 which forms a sliding guide for the bar 37. The bar 37 is longitudinally movable by means of the handle 39 and link 40. 1

tion with the shoe 16 engaging the material. In this position the mechanism is in position to perform the second turnover operation by forcing the bar 37 carrying the roller 36 inwardly to spin the metal to conform to the right hand surface of the shoe 16.

A cutting off tool 41 is adjustably mounted with a backing screw 52 in a block 42 having a limited sliding motion with respect to an adjustable support 50 on the carriage and disposed in a plane where it will not interfere with either of. the spinning tools or the trimming tool. This cutting off tool is actuated a separate lever 43 and link 44, the lever being pivoted about a bolt 4 having a friction washer 46 to prevent chat- The operation is as follows: A series of graduated sizes of gaskets can be formed from a single plate, starting'with the largest size desired. Usually a separate set of.

face plates for each size will be used; but two or more rings may be made at one set up in the lathe by advancing the lathe cross slide after completing the first ring, by starting with a smaller pair of face plates than s indicated in the drawings.

The first step in the production of a gasket or series thereof is the production of a circular plate with a centering hole that is mounted between the face plates 11 and 12 on the lathe, and driven by the frictional contact so produced. With the device of this invention mounted as shown in Fig. 1;

' with the shoe or anvil contacting the plate 10 and'at a proper distance from the lathe center. line to produce a gasket of the desired diameter; the first turn-over roller 15 is moved to the right by manual movement of the lever 17, producing a right angle bend or circumferential flange on the plate 10, the shoe 16 and the back of the roller 36 forming a continuous anvil insuring a smooth surfaced flange in conjunction with the finger 27. Continued movement of the handle 17 brings the trimming tool 29 into action through the slip or lost motion link 34. After the completion of the trimming op eration, the roller 15 is returned to its initial position and the carriage 2O moved to the right by means of the lever 24 until the roller 36 clears the edge of the flange, when the bar 37 and roller 36 is withdrawn to a position outside the flange by means of the lever 39. With the roller 36 outside the flange the carriage is returned to its initial position, bringing the roller 36 and shoe 16 into the position shown bythe full lines in Fig.

5. An inward movement of the bar 87 carrying the roller 36 completes the second turn-over or spinning operation, producing a U-shaped ring at the circumference of the plate 10. The final step comprises severing the ring from the balance of the plate by moving the cutting tool 41 to the left by means of the lever 43.

It will be evident that a roller type anvil can-be substituted for the stationary shoe 16. With the shoe as shown, any diameter of ring can be formed, the smallest size being limited by the radius of the point of the member 16. In ordinary production a large number of the largest rings are made at one set-up and then the machine is readjusted to make the next smaller size ring from the blanks formed in producing the largestsize, and so on, to eliminate Waste of material. In practical operation, 6-inch rings have been turned out at the rate of 23 seconds apiece.

It will be evident that this machine is equal y adapted to form L-shaped packing rings by omitting the second turn-over or spinning operation.

I am aware that numerous details of con struction may be varied through a Wide range Without departing from the principles of this invention, and I therefore do, not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1,. A metal spinning machine comprising means adapted to turn over the edge of a metal plate at right angles, mechanism for trueing the edge of said turned over portion, means for further spinning said turned over portion into a return bend, and mechanism adapted to sever the annulus so formed from the balance of the metal plate.

2. In a machine of the class described a forming shoe, means for rotating material in a plane contacting said shoe rollers for spinning said material over said shoe, guide means engaging said material during the spinning operation to prevent buckling thereof, and means adapted to trim the edge of the material.

3. In a machine of the class described a forming shoe, means for rotating material in a plane contacting said shoe rollers for spinning said material over said shoe, guide means engaging said material during the spinning operation to prevent buckling thereof, and trimming and severing tools for completing the gasket.

4. A metal spinning machine comprising forming means adapted to serve as an anvil, means adapted to turn over the edge of a metal plate at right angles over said forming means, mechanism for trueing the edge of said turned over portion, means for further spinning said turned over portion into a return bend, and mechanism adapted to sever the annulus so formed from the balance of the metal plate.

5. In a metal spinning machine, a stationary forming, member contacting one surface of the material tobe spun, a spinning member adapted to engage on the other side of said material, a material holding member yieldingly engaging said material opposite the spinning member.

6. In a metal spinning machine, a station'- ary forming member contacting one surface of the material to be spun, a spinning member adapted to engageon the other side of said material, and a second spinning member adapted to continue the bend started by the first mentioned member, a material holding member yieldingly engaging said' subscribed my name in the presence of tWo subscribing witnesses.

I MURDOCH MATHESON. I Witnesses? CHARLES W. HILLS, J r., CARLTON HILL. 

